Relative Momentum Index    The Relative Momentum Index (RMI) was developed by Roger Altman. Impressed 
    with the Relative Strength Index's sensitivity to the number of look-back 
    periods, yet frustrated with it's inconsistent oscillation between defined 
    overbought and oversold levels, Mr. Altman added a momentum component to the RSI.
    As mentioned, the RMI is a variation of the RSI indicator. Instead of counting 
    up and down days from close to close as the RSI does, the RMI counts up and down 
    days from the close relative to the close x-days ago where x is not necessarily 
    1 as required by the RSI). So as the name of the indicator reflects, "momentum" is 
    substituted for "strength".    
